| 摘要 |
<p>Varnish composition comprises at least: a hardenable oligomer; a hardenable monomer comprising alkoxylated and/or poly-alkoxylated acrylic monomers comprising one or more di-or tri-acrylates; and a photo-initiator, where the hardenable oligomer is a group of which the viscosity is greater than 1 Pa at 23[deg] C, in that the ratio of oligomer and monomer proportion is 1/6 to 1/25, and in that the mixture of components of the varnish has a viscosity of 15-22 mPa.s at 25[deg] C and 5-2 mPa.s at 60[deg] C, and a surface tension of 21-28 mN/m at 25[deg] C. An independent claim is included for a preparation of the varnish to cover the surface of a printed substrate and deposited by jet ink comprising mixing the viscosity reducer with inhibitor of free radicals and the photo initiator at a temperature of 150-300[deg] C, cooling the mixture to obtain an ambient temperature; and adding at least one hardenable oligomer, at least one hardenable monomer by stirring.</p> |
